"Bob Harrington" wrote in news:zSDTc.125669$8_
6.26893@attbi_s04:

Psalm 110 wrote:
Heads-Up! Killer Heat Wave followed by Killer Typhoon -- Coincidence?
Not at all. Heat is the food that creates and sustains creation of
typhoons, cyclones, huricanes and tornadoes. The powerful updraft
thermals draw in unstable cooler air which condenses the water vapor
contents to rain. Sustained cyles of updrafts reaching high altitude
cool the wet air sufficiently that self-perpetuating storms coalese.

Of course. This explains why the Sahara desert sees nothing but
unrelenting deluge from the permanent monster hurricane parked over the
140° sand dunes.

Did you note the mention of water vapor? It's a bit hard to get large
amounts of water over the Sahara desert, that's why it is a desert.

To be a bit more exact than Psalm, what makes the intensity of hurricanes
go up as temperature rises is the non-linear dependence on water vapor
pressure with temperature. Warm, moist air contains a lot of latent heat
that can be released by cooling, and that is what a hurricane does, it is
basically a heat engine.